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Huawei H19-308_V4.0 Exam Syllabus Topics:
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NEW QUESTION # 12
Which of the following data application scenarios can object storage be used in? (Choose all that apply.)
- A. Banking: document imaging
- B. Manufacturing: email storage
- C. Enterprise: backup and archiving
- D. Government: database
Answer: A,B,C
Explanation:
Object storage is optimized for unstructured data and is widely used for document imaging, email storage, and large-scale backup and archiving, but it is not suitable for transactional database workloads.
NEW QUESTION # 13
Which of the following features are supported by SmartThin LUNs?
- A. SmartCompression
- B. SmartDedupe
- C. SmartErase
- D. SmartQuota
Answer: A,B
NEW QUESTION # 14
Each LUN on Dorado V6 is owned by a specific controller.
- A. True
- B. False
Answer: A
NEW QUESTION # 15
Which are the customer benefits of Huawei storage RAID 2.0+? (Multiple Choice)
- A. Automatic global load balancing
- B. Substantial performance improvement
- C. Fast data reconstruction
Answer: A,B,C
NEW QUESTION # 16
How many faulty nodes can OceanStor Pacific tolerate at most?
- A. 4 nodes
- B. 3 nodes
- C. 2 nodes
- D. 1 node
Answer: B
Explanation:
OceanStor Pacific uses 4-1 erasure coding by default, allowing up to 3 faulty nodes while still maintaining data availability.
NEW QUESTION # 17
Source deduplication reduces the amount of data to be transmitted, saves network bandwidth, and transmits non-duplicate data, improving logical backup bandwidth and shortening backup time.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Huawei OceanProtect utilizes source deduplication to optimize the data protection process. In traditional backup scenarios, the entire dataset is sent over the network to the backup target, which can consume significant bandwidth and time. With source deduplication, the storage system or backup agent identifies redundant data blocks at the source-before they are sent over the network.
By comparing new data chunks against a local cache of already-transmitted fingerprints, the system ensures that only unique, non-duplicate data is physically moved across the production-to-backup link. This significantly reduces network bandwidth consumption and effectively increases the logical backup bandwidth, as the system can process larger volumes of data without being limited by physical network throughput. Consequently, the backup window is shortened, allowing organizations to meet tight RPOs even in environments with limited network resources or massive data growth.
NEW QUESTION # 18
Which statements about enterprise-level and desktop-level disks are correct?
- A. The performance differences between enterprise-level and desktop-level disks lie in the rotational speed, cache, and average seek time.
- B. Enterprise-level disks are designed for enterprises. They are mainly used on servers, storage arrays, and graphics workstations.
- C. Compared with desktop-level disks, enterprise-level disks deliver lower reliability and longer mean time between failures (MTBF).
- D. Desktop-level disks are mainly used on PCs and laptops.
Answer: A,B,D
NEW QUESTION # 19
Which is not a disadvantage of DAS?
- A. Poor scalability
- B. Low resource utilization
- C. Simple connection
- D. Poor reliability
Answer: C
Explanation:
DAS has several recognized disadvantages in enterprise storage architecture. Because storage is directly attached to one server, it is difficult to expand flexibly across many hosts, which leads to poor scalability. Resource utilization is also low because unused capacity attached to one server cannot be easily shared by other servers. Reliability can also be limited because DAS usually lacks the advanced redundancy, multipathing, clustering, and centralized management features available in SAN or NAS storage systems. However, simple connection is not a disadvantage. It is actually one of DAS's main advantages. DAS is easy to deploy because it connects directly to the server through local interfaces without requiring FC switches, Ethernet storage networks, or complex configuration. Therefore, the option that is not a disadvantage of DAS is simple connection.
NEW QUESTION # 20
Compared with HDDs, SSDs have high I/O performance and low latency.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
SSDs (Solid State Drives) provide significantly higher I/O performance and lower latency compared to HDDs (Hard Disk Drives) because they use flash memory rather than spinning disks. This allows for faster data access and processing, making SSDs ideal for performance- intensive applications.
NEW QUESTION # 21
Which of the following are key capabilities and highlights of the OceanStor F V5?
- A. 12 Gbit/s ink to disk enclosures (VMAX still uses 6 Gbit/s SAS back end links with low performance)
- B. Support for inline deduplication and compression (most optimized AFAS do not support deduplication or support only post-p compression)
- C. Support for QoS and cache partitioning (key requirements of high-end storage)
- D. High scalability (8 controllers supported by mid-range deices, 16 supported by high-end devices)
Answer: A,B,C,D
NEW QUESTION # 22
By deploying an object storage gateway based on the existing SAN or NAS storage, the S3 object storage service can be quickly provided. This is the mainstream delivery mode in the future.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
While it is technically possible to use a gateway to provide object interfaces over traditional storage, Huawei documentation explicitly states that this is not the mainstream delivery mode for the future of cloud-native data. Traditional SAN or NAS architectures are built on hierarchical file systems or block volumes, which face significant metadata performance bottlenecks and scalability limits when forced to handle billions of objects.
The "mainstream" and recommended approach by Huawei is Native Object Storage, such as that found in the OceanStor Pacific series. Native object storage is built on a flat architecture from the ground up, allowing for massive horizontal scalability, a global namespace, and superior metadata handling through distributed indexing. Using a gateway is considered a legacy transition method or a "bridge" solution, but it lacks the efficiency, performance, and durability required for modern big data, AI, and cloud-native applications that natively use the S3 protocol.
NEW QUESTION # 23
A customer wants to purchase an object storage system for use of different departments. These departments are independent and one cannot access the data of another. The expenses are shared by the departments.
Which features would you recommend to the customer?
- A. Billing
- B. Quota
- C. Multi-tenant
- D. Replication
Answer: A,B
NEW QUESTION # 24
2200 V3/2600 V3 supports 2 U 2.5-inch disk enclosure, 4 U 3.5-inch disk enclosure, and 4 U high- density disk enclosure.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 25
Controllers on the new-gen OceanStor hybrid flash storage are interconnected using RDMA.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
This statement is true as it describes a core architectural component of the Huawei SmartMatrix fully-interconnected design. In the new-generation OceanStor hybrid flash systems, multiple controllers within a cluster must communicate at extremely high speeds to synchronize cache data and manage metadata across the entire storage pool.
To achieve the low latency required for these operations, Huawei utilizes RDMA (Remote Direct Memory Access) for controller interconnection. RDMA allows one controller to access the memory of another controller directly, bypassing the operating system's kernel and reducing CPU overhead. This high-speed back-end interconnection (often operating at 100 Gbps or higher) ensures that data can be mirrored between controllers almost instantaneously, which is critical for supporting symmetric active-active services and maintaining 99.9999% availability. By using RDMA, Huawei can deliver "flash-like" performance even in hybrid arrays by ensuring that the architectural bottlenecks of traditional controller communication are eliminated.
NEW QUESTION # 26
What are the major changes of OceanStor V5 compared with OceanStor V3?
- A. Both hardware and software completely changed
- B. Software re-written
- C. Hardware upgrade
Answer: C
NEW QUESTION # 27
Which types of host ports are supported by the 2200 V3? (Multiple Choice)
- A. SAS
- B. 16/8Gbit/s FC
- C. 10 Gbit/s FCoE
- D. 10 Gbit/s iSCSI
- E. 1 Gbit/s iSCSI
Answer: B,C,D,E
NEW QUESTION # 28
Which are the advantages of Dorado Vo smart disk enclosures?
- A. Improving storage performance
- B. Accelerating data reconstruction
- C. Reducing the impact of data reconstruction on services
- D. Reducing energy consumption
Answer: A,C,D
NEW QUESTION # 29
What conditions must be met so that OceanStor F V5 series and V5 series can migrate data from heterogeneous third-party storage devices without interrupting services? (Multiple Choice)
- A. The host is configured with multipathing software.
- B. The third-party storage device is in the heterogeneous compatibility list of Huawei.
- C. The host OS is Linux, ESXi, or hp-ux.
Answer: A,B,C
NEW QUESTION # 30
Which indicator indicates the time required for system recovery after a disaster occurs?
- A. TCO
- B. RPO
- C. RTO
- D. RIO
Answer: C
NEW QUESTION # 31
Which of the following statements about SmartTier (intelligent file tiering) are true?
- A. Scope: Applies to single file systems
- B. Tiering granularity: File
- C. Three-tiered: SSDs, SAS disks, and NL-SAS disks
- D. Migration modes: Automatic and user defined policies
Answer: B,C,D
NEW QUESTION # 32
The RPO of a storage product is 30 minutes and the RTO is 15 minutes. Which statements are correct?
- A. If the storage system is faulty, there may be 30 minutes of data differences between the production site and the disaster recovery site.
- B. It may take 45 minutes to bring one or more applications back from an outage to a correct running state.
- C. If the storage system is faulty, there may be 45 minutes of data differences between the production site and the disaster recovery site.
- D. It may take 15 minutes to bring one or more applications back from an outage to a correct running state.
Answer: A,D
NEW QUESTION # 33
In which scenario is the level-2 cache used to improve system performance?
- A. Backup
- B. Video and image storage
- C. Online transaction processing (OLTP) database
Answer: C
Explanation:
Level-2 cache (such as SSD cache) is especially effective for OLTP databases, which require fast random read and write access. The cache accelerates data access and significantly improves system performance in these high-transaction environments.
NEW QUESTION # 34
When user A modifies a file in the NAS system, which of the following operations can user B perform on the file?
- A. File deletion
- B. File renaming
- C. File reading
- D. File modification
Answer: A,B,C,D
Explanation:
In a NAS system, if user permissions allow, user B can perform file renaming, reading, deletion, and modification operations on a file modified by user A. Access depends on the configured permissions for each user.
NEW QUESTION # 35
Which are characteristics of centralized storage compared with distributed storage?
- A. Support for multiple network connection protocols
- B. Closed-source software system
- C. Support for scale-up and scale-out
- D. Lower latency
- E. Dedicated hardware with higher reliability
Answer: B,D
NEW QUESTION # 36
Which is the DR management software provided by Huawei?
- A. eService
- B. DeviceManager
- C. BCManager
- D. SystemReporter
Answer: C
Explanation:
Huawei OceanStor BCManager (Business Continuity Manager) is the dedicated software suite designed for managing disaster recovery and backup environments. While other tools perform different functions, BCManager is specifically engineered to orchestrate the entire DR lifecycle:
Management (eReplication): This component manages disaster recovery for various applications (like databases and VMs). It automates the recovery process, performs DR drills without interrupting services, and visualizes the DR topology.
Backup (eBackup): This component handles the backup of virtualized environments.
In contrast, DeviceManager (Option B) is the on-box management tool for single-array configuration. SystemReporter (Option A) is used for performance analysis and reporting. eService (Option D) is a cloud-based proactive monitoring and maintenance platform. Therefore, BCManager is the correct choice for specialized DR management.
NEW QUESTION # 37
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